giant tortoise(n = noun.animal) - very large tortoises of the Galapagos and Seychelles islands;
is a kind of tortoise
is a member of genus testudo, testudo, genus geochelone, geochelone

box tortoise, desert tortoise, european tortoise, gas giant, giant, giant anteater, giant armadillo, giant bamboo, giant buttercup, giant cane, giant chinkapin, giant clam, giant cockroach, giant conch, giant coreopsis, giant crab, giant eland, giant fern, giant fir, giant foxtail, giant fulmar, giant garlic, giant granadilla, giant helleborine, giant hornet, giant hyssop, giant kangaroo, giant lizard, giant moa, giant northwest shipworm, giant panda, giant petrel, giant pigfish, giant potato creeper, giant puffball, giant red paintbrush, giant reed, giant ryegrass, giant salamander, giant scallop, giant schnauzer, giant scrambling fern, giant sequoia, giant silkworm, giant silkworm moth, giant squid, giant star, giant star grass, giant stock bean, giant sunflower, giant taro, giant timber bamboo, giant water bug, giant willowherb, gopher tortoise, little giant, pacific giant salamander, painted tortoise, red giant, red giant star, texas tortoise, tortoise, tortoise plant, tortoise shell, yellow giant hyssop